Oil pump



Feb. 25, 1930. WOOLSON 1,748,744

OIL PUMP Fibed May 6, 1926 numeral. :5, 1930 UNITED s'rATEs PATENTOFFICE HARRY I. WOOIJSOH, F DETROIT, MICHIGAN, ASSIGNOB TO QHBYSLEROOBPOBATION,

OF EEGHLAND PARK, MICHIGAN, A GORPORA'IIQN OF DELAWARE OIL rmApplication fled May 6,

It is the primary object of my invention to construct a cheap andeconomical oil pump for use in an automobile to pump oil andsimultaneously draw air from a vacuum tank during certain points of thecycle of rotation of the pump.

Another object of my invention is to pump oil and draw air into achamber, keeping the air entry segregated from the oil inlet and outletof the chamber.

' A further, object of my invention is to create enough air suction inan oil pump having a short oil'conduit from the oil source tosatisfactorily operate a vacuum tank.

With the above and other objects in view, my invention consists in thearrangement, combination and construction of the various parts of myimproved device as described in the specification, claimed in my claimsand 20 shownin the accompanying drawing, in

which:

Fig. 1 is a side elevation of my improved device shown partly insection.

Fig. 2 is a plan view of my improved device 26 shown partly in section.

Fig. 3 is a sectional view of my device taken on line 3-3 of Fig. 1.

I have shown a housin 10 having a flanged bottom edge 11 to which issecured by bolts 12 a0 a cover late 13 formin with thehousin 10 a chainr 14. Exten g u from an integral with the top 15 of the ousing 10 is atubular casing 16 having the aperture. 17 therein terminating at one endinto the chamber 14 and at the other end into a reduced aperture 18formed by a shoulder 19 on the to of the casing 16.

laced in an eccentric position for rotation in the chamber 14 is a head20 of a pump member, said head having a portion of its circumferencetouching as at int 21 the inner wall of the housing 10. A shaft 22projects up from the center of the head 20 into the aperture 17 andintegral with the shaft 22 is a stem 23 positioned in the aperture 18. Aspiral groove 24 is cut into the shaft 22 to permit oil to lubricate thesame during rotation.

A slot 25 divides the head 20 into two equal parts and 'tioned forreciprocation in the 50 slot are the block members 26 and 27 that haveimproved their outer ends chamfered as at 28. Coiled springs 29, holdthe blocks 26 and 27 yieldingly against the wall of the chamber. Grooves30 are cut into the top of the head 20 adjacent the chamfered sides 28of the blocks 26 and 27.

An oil intake passage 31 having an opening 32 in the chamber 14 and anoil outlet passage 33 having an opening 34 into the chamber 14 areintegral parts of the housing 10. A drain plug 35 is placed in the-endof the passage 31 and also threaded into this assage intermediate itsends is a pipe 36 a apted to convey oil from a conventional source ofoil su ply such as the crank case of an automo 1le. The outlet passage33 may be suitably connected to' the various pomts in an internalcombustion engine where oil is used.

Formed in the cover plate 13 is a conduit 37 with the opening 38 leadingtherefrom into the chamber 14 and positioned between the openingsv 32and 34. Connected with this conduit 37 is an intake line 39 adapted todraw air from a conventional type vacuum tank, not shown. In thepractical operation of my improved device the head 20 is rotatedclockwise in the chamber 14 by the shaft 22, stem 23 and a source ofrotative power, not shown, connected with a flange 40 on the end of thestem 23. The rotation of. the head 22 simultaneously draws air and oilinto different portions of the chamber 14 that are segregated by theblocks 26 and 27 and-the point 21 where the head 20 touchesthe wall ofthe housing 10. i

The air is drawn from the conventional vacuum tank into the chamber 14in back of p the blocks 26 and 27 after the same have passed the outletopening 34 and one. of the grooves 30 is an open connection with theopening 38 of the conduit 37 in the cover plate 13. At the same time oilis drawn into the chamber in back of the blocks 26 and 27 after theyhave passed'the inlet. opening 32. This until the same pass the inlet 32at which point oil is admitted. Thus the amount of air drawn into thepum can be determined so that thesame is suflicient to set up a suctionin the vacum tank to draw the proper amount of gasoline for consumptionin the I automobile.

at two periods during a complete cycle of the pump. The entry oi the airis entirely independent and segregated from the pumping ofv oil into andout of the chamber 14.

It will be obvious that various changes may be made in the arrangement,combination and constructionof the various parts of my improved devicewithout departing from the spirit of my invention and itis my intentionto cover by my claims such changes as may be reasonably included withinthe scope thereof.

What I claim is:

1. A device of the class described, comprising a housing, a cover platesecured to the bottom of said housing forming a chamber therewith, aninlet and an outlet passage for said chamber integral with said housing,a conduit integral with said 'cover and having an opening into saidchamber, and means adapted to simultaneously draw oil into and out of aportion of said chamber through said passages and intermittently drawair into the remaining part of said chamber through said conduit in thecover.

2. A device of the class described comprising a housing, a cover platesecured to said housing forming a chamber therewith, an

inlet and an outlet passage'into and from said chamber and integral withsaid housing, a conduit integral with said cover plate and having aslotted opening into said chamber, a ump member having a slot in thecenter t ereof placed in eccentric position in said chamber, blockmembers having chamfered outer ends positioned for reciprocation in saidslot, meanspositioned between said blocks forcing the chamfered ends tobear yieldingly against the wall of said housing, a groove in the ,topof said head adja-v cent each of said blocks, and means rotating saidpump member to simultaneously draw oil into and force it out of aportion of said chamber through said passages and to draw air into theremainder of the chamber through said slotted opening in the cover andthe grooves in said pump member.

3. A device of the class, described comprising, a housing having achamber therein, two segregated inlets and a segregated outlet adaptedfor communication with said chamber, rotating means intermittentlydrawing air into a portion of said chamber to create a vacuum andcontinuously drawing oil into another portion of said chamber.

4. A device of the class described comprising, a housing having achamber therein, means for progressingly increasing the area of aportion of said chamber and progressingly decreasing the area of anotherportion of said chamber,.an inlet passage communicating with saidincreasing portion for a predetermined interval, another inlet passagecommunicating with said increasin portion after the 'communicationofsaid st inlet passage and an outlet passage communicating with saiddecreasing portion.

5. A device of the class'described com prising a housing, a coverplatesecured to the bottom of said housing formin a cylindrical chambertherewith, spaced mlet and outlet passages in the cylindrical wall ofsaid chamber, an eccentric rotor within said chamber, reciprocatingvanes carried by said rotor, the outer ends of which engage thecylindrical wall, a slotted inlet passage in the end of said chamber,and a passage in said rotor adapted to form an intermittentcommunication between said slotted passage and the space between thecylindrical wall and the rotor.

6. A device of the class described comprising a housing having a chambertherein, two segregated inlets and a segregated outlet adapted forcommunication with said chamber, an eccentric rotary member within saidchamber, reciprocating vanes carried by said housing forming a pair ofchambers between the wall of said chamber and said rotary member, and apassage carried by saidtrically disposed in a pum body, an outlet forsaid pump, an oil inlet or said pump, an

air inlet for said pump, one of said inletsbeing closed by an endsurface of said rotor, and a channel in said rotor connecting said iioinlet with said pump during a part of the intake cycle of said pump. I

8. In an oil pump for an internal combustion engine, the combination ofa rotor eccentrically disposed in a pump body, anoutlet for said pump,an oil inlet for said pump, an air inlet for said pump adapted to be.closed by an end surface of said rotor, and a channel in said rotorconnecting'said air inlet with said pump during a part of the intakecycle of said pump. 1

9. In an oil pump for an internal combustion engine, the combination ofa rotor eccentrically disposed in a pump body, an outlet for said pump,an oil inlet for said pump, an air inlet terminatin in a crescent shapedslot in said pump b0 and adapted to be covered and uncovered by one ofthe end I a V j faces of said rotor, and a channel in said rotor outletfor said 'a part of t connectinasaid slot with said ump during e intakecycle of sai pump.

10. In an oil pump for an internal combustion engine, the combination ofa rotor eccentrically disposed in a pump body, an gun 1p, an oil inletterminating insaid pump ody in the form of an elongated slot, an airinlet adapted to be covered and uncovered by one of the end faces ofsaid rotor, and a channel in said rotor connecting said air intake withsaid pump dur ing' a part of the intake cfi cle of said gump.

- HARRY WOOLS N.

